-AC_CHECK_HEADERS([fcntl.h sys/socket.h sys/select.h sys/time.h sys/types.h unistd.h windows.h winsock2.h errno.h sys/epoll.h sys/event.h ares.h])
-
-AC_CHECK_LIB(ws2_32, main, [ LIBS="$LIBS -lws2_32" ], [])
-AC_CHECK_LIB(ssl, SSL_read, [
- AC_CHECK_LIB(crypto, X509_new, [
- AC_CHECK_HEADERS(openssl/ssl.h openssl/err.h openssl/rand.h, [
- LIBS="$LIBS -lssl -lcrypto"
- ])
+AC_CHECK_HEADERS([fcntl.h sys/socket.h sys/select.h sys/time.h sys/types.h unistd.h windows.h winsock2.h errno.h sys/epoll.h sys/event.h])
+
+AC_CHECK_LIB(ws2_32, main, [
+ LIBS="$LIBS -lws2_32"
+ is_win32="yes"
+], [
+ is_win32="no"
+])
+
+have_gnutls="no"
+AC_CHECK_LIB(gnutls, gnutls_init, [
+ AC_CHECK_HEADERS(gnutls/gnutls.h, [
+ LIBS="$LIBS -lgnutls"
+ have_gnutls="yes"